Post a New Question

college algebra

posted by on .

if y vaires directly as x^2 and y=20 when x=4, find y when x=7?

I got 61.25 but was not sure if it was correct...

  • college algebra - ,

    y = kx^2
    20 = k*16
    k = 5/4

    so, y = 5/4 x^2
    y(7) = 5/4 * 49 = 61.25

    Good job.

Answer This Question

First Name:
School Subject:
Answer:

Related Questions

More Related Questions

Post a New Question